Electrical / Electronics
Battery charge time
Roughly estimates charge time from capacity and charge current.
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Battery runtime
Estimates runtime from battery capacity and load current.
Battery runtime with efficiency
Estimates runtime from capacity, system efficiency and load current.
Current from C-rate
Estimates current from C-rate and battery capacity.
Battery energy in Wh
Estimates battery energy from nominal voltage and amp-hour capacity.
Parallel battery pack capacity
Calculates pack capacity from parallel cell count and single-cell capacity.
Battery voltage sag
Calculates approximate voltage drop across internal resistance at a given current.